Grinder for packing-rings for pistons.



No. 793,276. PATENTED JUNE 27, 1905. W. CHAMBERS.

GRINDER FOR PACKING RINGS FOR PISTONS.

APPLIOATION FILED AUG.12,1904.

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mm) m mmw 110,793,276. PATENTED JUNE 27, 1905. W. CHAMBERS.

GRINDER FOR PACKING RINGS FOR PISTONS.

APPLICATION FILED AUG. 12,1904.

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@ W 77-77%www- UNiTED STATES Patented. June 27, 1905.

PATENT @FFICE.

GFHNDER FOR PACKING-RINGS FOR PISTONS.

SPECIFICATION forming part Of Letters Patent NO. 793,276, dated June 2'7, 1905.

Application filed August 12, 1904:. Serial No. 220,553-

Be it known that l, WAnuuN Ginnmuns, a citizen of the United States of America, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Grinders for Packing-Rings for Pistons, of which the following is a specification.

The object of this invention is the production of a gririding-machine for shaping the peripheries of metallic packing-rings of the pistons of cylinders of steam, gas, gasolene, and other engines, &c., to adapt them to lit the interiors of their respective cylinders as nicely as possible; and it consists, essentially, of a circular holder for supporting and maintaining piston-rings as near as may be in the form of a true circle while they are being fitted by grinding, mechanism for rotating the rings as they are being ground, and an emerywhcel or other suitable grinding means for grinding such rings as they are being rotated in the holder of the machine.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is a top plan view of a machine embodying my invention. Fig. 2 is a section at the dotted line 2 2 in Fig. l of parts there shown. Fig. 2 is a right-hand end view of the machine as seen in Fig. 2. Fig. 3 is a left-hand end view of the machine with the base of its frame broken away. Fig. 4: is a side view of a section of a cylinder adapted to be cut into packing-rings for pistons. Fig. 5 is an end view of a packing-ring after it has been cut from the cylinder shown in Fig. 4 and severed at its thinnest part. Fig. 6 is a side view of the ring shown in Fig. 5.

Like letters of reference indicate correspoi'iding parts throughout the several views.

The main frame of the machine is formed, preferably, by casting and may consist of a base portion A, supporting a horizontal table A, which carries an upper supporting-frame A having horizontal shaft-bearings A and a vertical shaft-bearing A" therein.

B is a shaft mounted in the horizontal bearings A" in the frame A and provided at one end with a worm B.

B" is an emery-wheel or other suitable grinding-wheel fast-mounted on the shaft B.

B is a driving-pulley, also fast-mounted on the shaft B.

G is a vertical shaft mounted in the bearing A in the frame A C is a worm-wheel fast-mounted on the upper end of the shaft G and meshing with the worm B on the shaft B.

U is a worm fast-mounted on the lower end of the shaft U.

D is a carriage slidably mounted on the machine-frame A and supporting a bracket D, which has a vertical shaft-bearing D therein and also serves as a support for parts to be described hereinafter.

D is a screw of the usual well-known variety for slidingly adjusting the carriage D and parts supported thereby.

E is a circular ring-holder having its side E adjacent to the grimling-wheel B sectioned away and provided with a horizontal ring-seat Ff and rigidly secured to the bracket D.

F is a shaft mounted in the vertical bearing D in the carriage D.

F is a finger fast-mounted by its inner end to the upper end of the shaft F and having its outer end F adapted to engage and rotate piston-rings to be described hereinafter.

G is a bevel-gear fast-mounted on the lower end of the shaft F.

ll H are two members of a shaft telescopically connected by means of the sliding parts l1 and mounted in bearings 11 H, the former in the main frame of a machine and the latter in the carriage D.

l is a bevel-gear mounted on the outer end of the shaft member H and meshing with the corresponding bevel-gear G on the lingershaft F.

J is a worm-wheel fast-mounted on the shaft member [*I and meshing with the worm C on the shaft C.

K is a segment of a preferably east and turned cylinder and is adapted to be transversely cut into rings K, which are then severed, preferably obliquely, at K, the point thereon at which the metal composing the same is thinnest. A fragment of the ring K may also be cut away to form a bearing K thereon for the engagement of the point F of the finger F therewith After a ring K has been placed in a holder E, the sole function whereof is to support and maintain such ring K as nearly as possible in the form of a true circle while being rotated and ground, of the proper diameter to receive the same and to permit it to be rotated therein by the finger F the carriage D is slid, by means of the adjusting-screw D, over toward and into slight contact with the adjacent face of the grinding-wheel B which is rapidly rotated by means of power applied to the pul ley B on the shaft 13, the worm B, worm-wheel C, shaft C, worm C and worm wheel J, meanwhile communicating therethrough very slow motion from the shaft B to the shaft H H, which in turn communicates like motion through the bevel-gears I G, shaft F, and finger F, which also in turn very slowly rotates the ring K on its seat F until its periphery is ground by the grinding-wheel B to adapt it to closely and nicely fit the interior of the cylinder for which it is destined.

Obviously interchangeable holders E of any desired diameter may be mounted on the carriage D, the telescopic connections H between two members of the shaft H H allowing the same to lengthen or shorten, according as the carriage is slid away from or toward the grinding-wheel B by means of its adjusting-screw D".

IVhat I claim as new, and desire to secure by Letters Patent, is-

1. In grinders for packing-rings for pistons, in combination, a circular holder, for rotatably supporting and maintaining the packingrings as nearly as possible in the form 'of a true circle, means for rotating the rings in their holder, while they are being ground, means for grinding the peripheries of the rings as they are rotated in peripheral eontaet with their holder, and supporting means for all of said parts, substantially as and for the purpose specified.

2. In grinders for packing-rings for pistons, in combination, a main frame, a shaft mounted therein, a grinding-wheel mounted on such shaft, a circular holder, having a portion of its side adjacent to the grinding-wheel sectioned away, a carriage, supporting the holder and arranged to be slid toward and away from the adjacent face of the grinding-wheel, a shaft mounted in the carriage, a finger, for rotating a ring while being ground, mounted on the shaft in the carriage, and means for rotating the grinding-wheel and finger-shafts, substantially as and for the purpose specified.

3. In grinders for packing-rings for pistons, in combination, a main frame, a grinder-shaft mounted therein and provided with a worm, a grinder mounted on such shaft, a carriage mounted on the main frame and slidable thereon toward and away from the grinder, a circular holder having a portion thereof adjacent to the grinder sectioned away and mounted on the carriage, a shaft mounted in the carriage, a finger mounted on the latter shaft and adapted to engage and rotate a ring in its holder and a worm-gear connection between the grinder-shaft and finger-shaft, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WARREN CHAMBERS.

itnesses:

L. L. MoRRIsoN, NELLIE E. ENNETT. 

